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A Cracking Methodology To Assess Fracture And Fatigue Properties Of Asphalt Concrete Mixtures Using Overlay Tester, Victor M. Garcia
A Cracking Methodology To Assess Fracture And Fatigue Properties Of Asphalt Concrete Mixtures Using Overlay Tester, Victor M. Garcia
Open Access Theses & Dissertations
Several highway agencies have either implemented or considered implementing performance tests to predict the cracking potential of asphalt concrete (AC) mixtures in the laboratory setting. One such test, the Overlay Tester (OT) test, measures the number of cycles to failure of the AC specimens by simulating the opening and closing of the cracks induced by daily temperature variations and high tensile strain generated by the traffic load. The variability of the OT test results is expressed as a major concern in reliably characterizing the cracking potential of the AC mixes.
The performance of the OT test, in general, and current …
Numerical Simulation Of The Overlay Tester, Andrea Gutierrez
Numerical Simulation Of The Overlay Tester, Andrea Gutierrez
Open Access Theses & Dissertations
The Overlay Tester (OT) is a relatively new testing procedure that characterizes the cracking resistance of hot mix asphalt (HMA) by evaluating the number of cycles to failure of an HMA specimen. The lack of repeatability and high variability of the results have been a concern to transportation agencies. A careful experimental review of the OT test protocol reveals the complex stress and strain distributions that should be understood in order to improve the certainty associated with the test.
The objective of this Thesis is to present the numerical modeling of the OT test through finite element analysis (FEA). When …